At Nashua, N. H., asbestos-wood, a new fireresistant composition, was recently tested, with apparent success. A square-pitched roof-hut, with four chimneys, was built of the material, the dimensions being 9x9x10 ft. The walls were double, with an air-space between 3/4-in. layers, there being, in addition, an inner lining of 1/2-in. thickness. The width of the air-space was i-in. In one wall was an ordinary single-lock tin-clad firedoor; in another wall was a solid asbestos-wood fire-door made of ⅝-in. sections, with an airspace of equal size; on the third wall was a paneled asbestos-wood fire-door, the edges being 1 ½ ins. thick, while the panels were but ½-in. thick, the door being fitted with ordinary light-weight hardware. The fourth wall was fitted with a wired-glass window set in asbestos-wood. Many holes in the flooring, with the four chimneys, furnished ample draught, and a large amount of cord-wood fuel produced a temperature of from 1,200° to 2,100° Fahrenheit, which was maintained for about an hour and fifteen minutes, when 1½-⅛. hose-streams were turned into the hut, and, after the fire had been extinguished and the walls cooled off, it was found that the new composition had stood a severe test most successfully. Even after the great heat generated, the walls and asbestos-wood fire-doors were intact, the only perceptible change being that, where the asbestos-wood had been exposed, the surface had been softened and flaked easily for about ⅛ of an inch. The ordinary tin-clad door was in position, but was pretty well gone and would have lasted but a short time longer, while the asbestoswood doors were but slightly warped and could be readily opened and closed. Beyond sagging a very little, the wired-glass window set in asbestos-wood was all right, the glass being cracked, as usual, but still presenting a fire-stop. It may be added that, before starting the fire, a double-walled box ( a cube 18 ins. on a side, with two ¾-in. walls) was placed in the test-house, and inside of the box were put some papers and money. This box. which was completely surrounded by wood fuel, was found intact, and its contents were not discolored, nor did the subsequent action of the water disintegrate the wood. The composition is the invention of. and has been patented by Professor C. L. Norton, of the Massachusetts Institute of Technology.
When the necessary pipes—some miles—have been laid from the Champion mine pumping station, the Champion. Trimountain and Baltic mining locations will take the water from the Copper Range Consolidated company.